Flow tube



FIG. 1 is a perspective view of a flow tube showing our design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof, opposite that shown in FIG. 2;

FIG. 4 is another side view thereof, 90 degrees offset from that shown in FIG. 2;

FIG. 5 is another side view thereof, opposite that shown in FIG. 4;

FIG. 6 is a top view of the flow tube; and,

FIG. 7 is a bottom view thereof.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a flow tube, as shown and described. 